133442040 has 32 divisors (see below), whose sum is σ = 400326480. Its totient is φ = 35584512.

The previous prime is 133442033. The next prime is 133442041. The reversal of 133442040 is 40244331.

It is a junction number, because it is equal to n+sod(n) for n = 133441998 and 133442016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133442041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555889 + ... + 556128.

Almost surely, 2^133442040 is an apocalyptic number.

133442040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133442040 is an abundant number, since it is smaller than the sum of its proper divisors (266884440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133442040 is a wasteful number, since it uses less digits than its factorization.

133442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112031 (or 1112027 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 133442040 is about 11551.7115614960. The cubic root of 133442040 is about 511.0117554546.

Adding to 133442040 its reverse (40244331), we get a palindrome (173686371).

The spelling of 133442040 in words is "one hundred thirty-three million, four hundred forty-two thousand, forty".